Burlington Executive Airport (ICAO: CZBA), is a small, privately operated general aviation registered aerodrome in rural Burlington, Ontario west of Toronto.
Boundary Bay Airport or Vancouver/Boundary Bay Airport (IATA: YDT, ICAO: CZBB) is located beside Boundary Bay and 2.5 nautical miles (4.6 km; 2.9 mi) east of Ladner in Delta, British Columbia, Canada, 8.5 NM (15.7 km; 9.8 mi) south southeast of Vancouver and close to the U.S.
Bathurst Airport (IATA: ZBF, ICAO: CZBF) is located 3 nautical miles (5.6 km; 3.5 mi) west northwest of Bathurst, New Brunswick, Canada in Sainte-Anne.
The Roland-Désourdy Airport (IATA: ZBM, ICAO: CZBM) (formerly known as Eastern Townships Regional Airport or simply Bromont Airport) is located 3.4 nautical miles (6.3 km; 3.9 mi) west-southwest of Bromont, Quebec, Canada.
Ilford Airport, (IATA: ILF, ICAO: CZBD), is located 1.5 nautical miles (2.8 km; 1.7 mi) south southwest of Ilford, Manitoba, Canada.
The double Gauss lens is a compound lens used mostly in camera lenses that reduces optical aberrations over a large focal plane.
Biogon is a brand name of Carl Zeiss for a series of photographic camera lenses. Biogons are typically wide-angle lenses.
The Czech Republic (/ˈtʃɛk rᵻˈpʌblɪk/ CHEK-rə-PUB-lik; Czech: Česká republika, Czech pronunciation: [ˈt͡ʃɛskaː ˈrɛpuˌblɪka]), also known as Czechia (/ˈtʃɛkiə/, CHEK-ee-ə; Czech: Česko, pronounced [ˈt͡ʃɛsko]), is a nation state in Central Europe bordered by Germany to the west, Austria to the south, Slovakia to the east and Poland to the northeast.
Czechoslovakia or Czecho-Slovakia /ˌtʃɛkoʊsloʊˈvækiə, -kə-, -slə-, -ˈvɑː-/ (Czech and Slovak: Československo, Česko-Slovensko) was a sovereign state in Central Europe that existed from October 1918, when it declared its independence from the Austro-Hungarian Empire, until its peaceful dissolution into the Czech Republic (Czechia) and Slovak Republic (Slovakia) on 1 January 1993.